Remove the need to specify any mappings on 26.1+

Author: hypherionmc

src/api/kotlin/xyz/wagyourtail/unimined/api/mapping/MappingsConfig.kt

@@ -35,6 +35,9 @@ abstract class MappingsConfig<T: MappingsConfig<T>>(val project: Project, val mi
     }) {
 
     private var innerDevNamespace: Namespace by FinalizeOnRead(LazyMutable {
+        if (minecraft.minecraftData.mcVersionCompare("1.21.11", minecraft.version) <= 0) {
+            return@LazyMutable Namespace("official")
+        }
         namespaces.entries.firstOrNull { it.value }?.key ?: error("No \"Named\" namespace found for devNamespace, if this is correct, set devNamespace explicitly")
     })